Step 3: The Parts

Here are the parts per the schematic

1 LM7805 5V regulator (blue box)
1 1k Resistor - this is for the feedback (green box)
1 182 Ohm resistor -this is for the LED (green box)
1 1k Pot - The adjustable resistor used for setting the voltage (red box)
1 LED - any color that isnt too bright
1 680uF 16V Capacitor -(Optional)-Used because the source is more than 6 inches away from the regulator (purple box)
1 1uF 16V Capacitor (optional also) - Same reason, used to help regulation. (purple box)
2 2.54 mm Headers I salvaged from a Old motherboard- These are used to plug in to the board
1 2.5mm Plug. I also salvaged this part, but got it from a old Speaker power supply (the grey box).

Also optional is a small TO-220 heatsink. I added this on for the hell of it since its adjustable (a bit of insurance). If you dont have a heatsink the LM78xx series will shutdown if it gets too hot or if you short the output. You can also use a screw and a peice of aluminum (not aluminum foil!-its too thin) or extra Copper PCB as a heatsink. The heat transfer may not be as good, but its better than nothing.
<p>Just a note to let you know I have added this ( a year ago ) to the instructable:</p><p> Comprehensive Guide to Electronic Breadboards: A Meta Instructable</p><p>&gt;&gt; <a href="http://www.instructables.com/id/Comprehensive-Guide-to-Electronic-Breadboards-A-Me/" rel="nofollow"> http://www.instructables.com/id/Comprehensive-Gui...</a></p><p>Take a look at a bunch of project involving breadboards.</p>
<p>Thanks! :) </p>
<p>if you don't want to build it yourself, there is cheap power supplies on the internet and I think that would be cheaper </p><p><a href="http://voltatek.com/en/home/27-breadboard-power-supply-33v-5v-mb-102.html" rel="nofollow">http://voltatek.com/en/home/27-breadboard-power-su...</a></p>
how van i use it to give me -10v ??
could you use a perfboard
Resistors in my local electronics store are so freaking expensive; Almost two euros each! Witch is about 2.8$ !&nbsp; Once I planned making a guitar distortion pedal and just to spend time I counted how much the resistors will cost on that one and I got about 37&euro;!<br />
well what i do is get a schematic of what you are doing and show it to your IT teacher. just say that i need the parts but i dont have them. i got a load of battery holders, caps and pots!<br />
&nbsp;Lol iv done that to tis easy make friends with ur DT or IT teacher and say its a project and hes like here's the key to the parts room take what u like LOL XD
now im at a place where i can spend &pound;50 on electronics! cool<br />
i'm lucky, in the philippines, i know a supplier just 5 minute travel by jeepney and walking. Their resistor costs .25 pesos, about .005 dollars, and well, their breadboard is 120 pesos, or frickin 1 dollar 40 cents<br /> online bullshit cant beat these prices...<br /> BTW, if you do live in the philippines, name is wiltron general merchandise, tel # 8821886 AND i am not advertising them, just for FYI's sake...<br />
When I try to download the schematics, the .sch file is saved as F03P09IFN82TDBA.tmp I just wanted to see it so I'm using Eagle 5.6.0 Light freeware. First time using Eagle also. Any ideas?
Instructables did something to the file (for whatever reason). Just rename it to what it shows (PSU.Sch and PSU.brd). It works for me using this method.
Id like to add Ive been using this module for a couple months now, and Ive noticed there are some problems;<br/><ul class="curly"><li>While plugging in and taking out the adapter, the PSU might come out of the board, so to prevent this, you have to hold it down</li><li>While doing so, you might accidentally increase the voltage. Not good for TTL/PICs/AVRs :(</li><li>The Regulator gets a bit warm, although this isnt a bad thing and is to be expected.</li></ul>
Good job on hitting hackaday! Anyhoo, great project - looks like it could be easily laid out on veroboard as well! I need exactly one of these.
I Hit Hackaday? =D =D =D<br/><br/>I also in the process of designing A SMPS version of this board, but it will be fully adjustable, since I dont know if the same trick will work with SMPS. But this may not be built because of lack of funds. It will Be SMD and I'll try to get it to fit on the same board-which is a challenge. <br/><br/>I could have made it 3.3V, But I dont need myself ever needing that voltage-unless I start getting into dsPICs or SD card communication. <br/>
And heres the link for those who are curious:<br/><a rel="nofollow" href="http://hackaday.com/2008/11/08/adjustable-breadboard-power-supply/">http://hackaday.com/2008/11/08/adjustable-breadboard-power-supply/</a><br/>
nice project!<br/>for people like me w/o mad pcb making skillz, sparkfun sells a kit like this<br/><a rel="nofollow" href="http://www.sparkfun.com/commerce/product_info.php?products_id=114">http://www.sparkfun.com/commerce/product_info.php?products_id=114</a><br/><br/><a rel="nofollow" href="http://www.curiousinventor.com/kits/bread_power">http://www.curiousinventor.com/kits/bread_power</a><br/>
Great! Simple, inexpensive and utilitarian (I'd be surprised if commercial versions don't turn up soon.)<br/><br/><sub>BTW, the Instructables interface includes drawing &quot;highlight&quot; boxes overlaying your images. Each box has a mouse-over text box you can customize....</sub><br/>

About This Instructable




Bio: I have an associates degree in electronics engineering, But Im going to go for my Bach, and then my Masters. Currently thinking of going for ... More »
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